Optical Membrane Edge Strengthening for LCD Backlight Wrinkling
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Solution Overview
Problem
Conventional optical membranes used in LCD devices are prone to deformation and wrinkling due to heat from light strips in backlight modules, affecting display quality.
Innovation Solution
Incorporating a strip-like strengthening member on the edges of the optical membrane, which can be wave-shaped, adhesive-coated, or a strengthening layer, to enhance stiffness and prevent wrinkling caused by thermal expansion and cold shrinkage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the optical membrane is made thin and flexible for display purposes, then it is easier to manufacture and install, but it becomes prone to deformation and wrinkling when heated by light strips
Solution Approach 1:
The patent applies composite materials by combining the optical membrane with a strengthening member to create a composite structure. The strengthening member, made of materials with higher stiffness and thermal stability, is integrated with the flexible optical membrane to form a composite that maintains both flexibility and resistance to heat-induced deformation.
Solution Approach 2:
The patent applies local quality by placing the strengthening member specifically at the edges of the optical membrane where it is most needed for prevention of wrinkling and deformation. This localized reinforcement provides structural support at critical areas without affecting the overall flexibility and optical properties of the membrane.
2Reliability
If the optical membrane is exposed to heat from light strips, then the backlight module functions properly, but the optical membrane wrinkles and deforms
Solution Approach 1:
The patent converts the harmful thermal expansion effect into a beneficial outcome by designing the strengthening member with a structure that accommodates thermal expansion while maintaining shape stability. The wave-shaped or ridged structure of the strengthening member allows it to expand thermally without transmitting deformation to the optical membrane.
Solution Approach 2:
The patent applies parameter changes by modifying the physical parameters of the strengthening member, such as its cross-sectional shape (wave-shaped, ridged, or hollow), material composition, and thickness, to optimize its thermal expansion characteristics and mechanical properties for resisting deformation under heat exposure.
3Reliability
If a strengthening member is added to the optical membrane, then resistance to heat-induced deformation improves, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the strengthening member with the optical membrane into a single composite structure that functions as one unit. The strengthening member is bonded or integrated with the membrane such that they work together as a unified component, reducing the need for separate assembly steps and simplifying the overall device structure.
Solution Approach 2:
The patent applies flexible shells and thin films by using a thin-film strengthening member that maintains flexibility while providing structural support. The strengthening member is designed as a thin, flexible component that can conform to the optical membrane without adding significant bulk or complexity to the device.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The strengthening member effectively prevents optical membrane deformation and wrinkling, ensuring improved display quality by maintaining the membrane's integrity under temperature variations and heat exposure.
Implementation Method 1
prevent the optical membrane from being deformed and wrinkled due to thermal expansion and cold shrinkage of the optical membrane caused by variation of the ambient temperature
Implementation Method 2
prevent the optical membrane from being deformed and wrinkled due to thermal expansion and cold shrinkage of the optical membrane caused by variation of the ambient temperature
Data Source
AI summary
The present disclosure provides an optical membrane, a backlight module, a display device and a device for manufacturing the optical membrane. The optical membrane includes a strip-like strengthening member arranged on at least one edge of the optical membrane. The backlight module includes the optical membrane. The display device includes the backlight module. The device for manufacturing the optical membrane with a wave-shaped edge includes: a cutter, configured to cut an edge of the optical membrane; and linear members, arranged between two parallel blades of the cutter and configured to press the edge of the optical membrane into a wave shape. Alternatively, the device for manufacturing the optical membrane with a wave-shaped edge includes: a cutter, configured to cut an edge of the optical membrane; and a roller, configured to press the edge of the optical membrane into a wave shape.